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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 193 |
| 10 | 369 |
| 11 | 2631 |
| 12 | 6147 |
| 13 | 72935 |
| 14 | 183013 |
| 15 | 4104827 |
| 16 | 12415887 |
| 17 | 1843421399 |
| 18 | 7169739931 |
| 19 | 1106512780955 |
| 20 | 5150025315155 |
| 21 | 883358137678737 |
| 22 | 4992528269858869 |
[1,1,1,1,1,1,1,1,193,369,2631,6147,72935,183013, 4104827,12415887,1843421399,7169739931, 1106512780955,5150025315155,883358137678737, 4992528269858869] |